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A kind of sludge curing agent and preparation method thereof

A curing agent and sludge technology, which is applied in the field of sludge curing agent and its preparation, can solve the problems of heavy metals, microorganisms and viruses, and limit the use of sludge, so as to improve superconductivity, adsorption effect and purification effect. Effect

Active Publication Date: 2019-01-15
GUANGZHOU WATER CONSERVANCY & HYDROPOWER STATION CONSTR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the current sludge curing agent focuses on the research on the dehydration, compressive strength and water resistance of the sludge. The sludge after solidification has a lot of heavy metals, microorganisms and viruses, which limits the scope of use of the sludge after solidification.

Method used

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  • A kind of sludge curing agent and preparation method thereof
  • A kind of sludge curing agent and preparation method thereof
  • A kind of sludge curing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, the preparation of modified diatomite

[0036] a. Dry diatomaceous earth, pass through a 100-mesh sieve to obtain fine powder, then add hydrochloric acid with a volume concentration of 8%, the solid-to-liquid ratio of the fine powder to hydrochloric acid is 1g:2mL, heat to 110°C for 3h, Cool, wash with water until neutral, and dry to obtain acidic diatomite powder;

[0037] b. adding nano-zinc oxide to the acidic diatomite powder obtained in step a and mixing uniformly, the weight ratio of the acidic diatomite powder and nano-zinc oxide is 1:0.5 to obtain mixture I;

[0038] c. dissolve xylitol in water and stir until completely dissolved, then add the mixture I obtained in step b and stir, the weight ratio of xylitol and mixture I is 6:1, form a uniform colloid, dry, grind, Instantly.

Embodiment 2

[0039] Embodiment 2, the preparation of modified diatomite

[0040] Dry diatomaceous earth, pass through a 100-mesh sieve to obtain a fine powder, then add hydrochloric acid with a volume concentration of 8%, the solid-to-liquid ratio of the fine powder to hydrochloric acid is 1g:3mL, heat to 110°C for 3 hours, cool, Wash with water until neutral, dry to obtain acidic diatomite powder;

[0041] b. adding nano-zinc oxide to the acidic diatomite powder obtained in step a and mixing uniformly, the weight ratio of the acidic diatomite powder and nano-zinc oxide is 1:0.6 to obtain mixture I;

[0042] c. Dissolve mannose in water and stir until completely dissolved, then add the mixture I obtained in step b and stir, the weight ratio of the mannose to mixture I is 8:1, form a uniform colloid, dry, grind, and obtain .

Embodiment 3

[0043] Embodiment 3, the preparation of wood ceramics

[0044] A. Dry the wood powder to a moisture content of <20%, crush and grind it and pass it through a 100-mesh fine sieve to obtain fine wood powder;

[0045] B takes by weight parts and is 70 parts of liquid epoxy acrylic resins with a solid content of 45%, 3 parts of low-temperature pyrolytic carbon, and 8 parts of Sn powder and stirs evenly to obtain a mixed solution;

[0046] C. Mix the fine wood powder obtained in step A and the mixed solution obtained in step B evenly in a weight ratio of 1:1, impregnate at normal temperature and pressure for 50 hours, dry, preheat in a heating furnace protected by inert gas, and gradually increase the temperature to 800°C, depressurize and extract the low-molecular components, then continue to heat up to 1200°C, carbonize in vacuum for 4 hours, and cool to obtain the product.

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Abstract

The invention belongs to the field of sludge treatment and particularly relates to a sludge solidifier and a preparation method of the solidifier. The sludge solidifier mainly comprises magnesia, modified kieselguhr, wood ceramic, poly-ferric sulfate, tea saponin, vanillin and sodium silicate. The prepared sludge solidifier has the advantages that the sludge solidifier is simple to operate, has good dehydration, and microorganism and heavy metal removal effects, improves the quality of sludge filtrate, and reduces environmental pollution; the sludge solidifier is low in cost and environment-friendly, and is convenient for large-scale popularization and application.

Description

technical field [0001] The invention belongs to the field of sludge treatment, and in particular relates to a sludge solidifying agent and a preparation method thereof. Background technique [0002] The dredged silt generated in the dredging project is usually disposed of by stacking or discarding. On the one hand, it not only occupies a large amount of land, causing a large amount of waste of land resources, but also throws it into the open sea, which will seriously affect the effective use of marine resources and have a negative impact on the marine environment. It will cause irreparable damage; on the other hand, most of the dredged silt contains heavy metals, organic matter and other pollutants, which will inevitably cause secondary pollution to the surrounding environment. At present, more and more attention has been paid to the impact of dredged silt on the environment, and it has become a restrictive factor for the development of large rivers and ocean engineering in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C04B28/26C04B18/02C04B14/08C04B20/02C04B22/14
CPCC02F11/008C04B14/08C04B18/02C04B20/023C04B22/149C04B28/26C04B14/361C04B18/023C04B24/00C04B24/008
Inventor 陈健肖孟富赖佑贤李东文陈伟粱闫晓满黄锦城
Owner GUANGZHOU WATER CONSERVANCY & HYDROPOWER STATION CONSTR ENG